Your question is Two-Sum Pair Sum Check. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Tell me about how you would implement a function isSumPair(int[] nums, int target) that returns true if any two integers in the list can add up to the target, allowing duplicates and negative numbers.